app_signal.h

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#ifndef INC_SIGNAL_H_
#define INC_SIGNAL_H_
 
#include <stdint.h>
#include "arm_math.h"
 
#define OUTPUT_SINE_SIGNAL_LEN              10
 
#define OUTPUT_SINE_AUDIO_LEN              100
 
#define INPUT_BUFF_LEN                     2048
 
#define BUFF_TO_DFT_LEN                    ( INPUT_BUFF_LEN / 2 )
 
#define FREQ_DOMAIN_LEN                    ( BUFF_TO_DFT_LEN / 2 )
 
#define POLAR_FORM_LEN                     FREQ_DOMAIN_LEN
 
#define ADC_MAX_VALUE                      4095
 
#define REF_VOLTAGE                        3.3f
 
#define ADC_HALF_COMPLETE_FLAG             0
 
#define ADC_FULL_COMPLETE_FLAG             1
 
 
typedef struct
{
    uint16_t adc1;                  
    uint16_t adc2;                  
} SIG_ADCRegister_t;
 
 
typedef struct
{
    float32_t real_part;            
    float32_t imaginary_part;       
} SIG_FreqDomain_t;
 
 
typedef struct
{
    float32_t phase;                
    float32_t magnitude;            
} SIG_PolarForm_t;
 
 
typedef struct SIG_Handle_t
{
    SIG_ADCRegister_t input_sig[INPUT_BUFF_LEN];                
    float32_t rx_coil_sig_to_dft[BUFF_TO_DFT_LEN];              
    float32_t tx_coil_sig_to_dft[BUFF_TO_DFT_LEN];              
    SIG_FreqDomain_t rx_coil_freq_domain[FREQ_DOMAIN_LEN];      
    SIG_FreqDomain_t tx_coil_freq_domain[FREQ_DOMAIN_LEN];      
    SIG_PolarForm_t rx_coil_polar[POLAR_FORM_LEN];              
    SIG_PolarForm_t tx_coil_polar[POLAR_FORM_LEN];              
} SIG_Handle_t;
 
 
extern SIG_Handle_t sig_handle;  
void sig_start(SIG_Handle_t *const handle);
 
void sig_load_samples(SIG_Handle_t *const handle, uint8_t flag);
 
size_t sig_perform_fft(SIG_Handle_t *const handle);
 
 
#endif /* INC_SIGNAL_H_ */